/*
 * Flashlib - QB9 common Flash library
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.qb9.flashlib.lang
{
	/**
	 * Returns the first element in a collection that passes a filter or null.
	 * Scans from left to right (like scanl in Haskell)
	 */
	public function scan(obj:Object, fn:Function, ...args:Array) : *
	{
		for each(var value:Object in obj)
			if (fn.apply(null, [value].concat(args)))
				return value;
		return null;
	}
}
